Sofa



FIG. 1 is a perspective view taken from the top, front and right side of a sofa showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being the mirror image of the right side;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view taken from the top, front and right side of a second embodiment of my new design.

The fragmentary broken line representation of a seat cushion in FIG. 7 is for the purpose of illustration only and forms no part of the claimed design. 

The ornamental design for a sofa, as shown and described. 